"Fuel Tank Repair Kit" is more than just pouring in a quart of sealer and sloshing it around. If gum, varnish, sludge or fuel is inside, they must be removed first. Our “Fuel Tank Sealer,” like all other sealers, will not work in a contaminated tank. Find out what the pros already know and get this “Fuel Tank Repair Kit” with everything you need to do the job right.